fce364c6c71a5e612fb9f0c2c65b0166749821af
[linux-2.6.git] / net / irda / iriap.c
1 /*********************************************************************
2  *
3  * Filename:      iriap.c
4  * Version:       0.8
5  * Description:   Information Access Protocol (IAP)
6  * Status:        Experimental.
7  * Author:        Dag Brattli <dagb@cs.uit.no>
8  * Created at:    Thu Aug 21 00:02:07 1997
9  * Modified at:   Sat Dec 25 16:42:42 1999
10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
11  *
12  *     Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
13  *     All Rights Reserved.
14  *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
15  *
16  *     This program is free software; you can redistribute it and/or
17  *     modify it under the terms of the GNU General Public License as
18  *     published by the Free Software Foundation; either version 2 of
19  *     the License, or (at your option) any later version.
20  *
21  *     Neither Dag Brattli nor University of Tromsø admit liability nor
22  *     provide warranty for any of this software. This material is
23  *     provided "AS-IS" and at no charge.
24  *
25  ********************************************************************/
26
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/skbuff.h>
30 #include <linux/fs.h>
31 #include <linux/string.h>
32 #include <linux/init.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
35
36 #include <asm/byteorder.h>
37 #include <asm/unaligned.h>
38
39 #include <net/irda/irda.h>
40 #include <net/irda/irttp.h>
41 #include <net/irda/irlmp.h>
42 #include <net/irda/irias_object.h>
43 #include <net/irda/iriap_event.h>
44 #include <net/irda/iriap.h>
45
46 #ifdef CONFIG_IRDA_DEBUG
47 /* FIXME: This one should go in irlmp.c */
48 static const char *const ias_charset_types[] = {
49         "CS_ASCII",
50         "CS_ISO_8859_1",
51         "CS_ISO_8859_2",
52         "CS_ISO_8859_3",
53         "CS_ISO_8859_4",
54         "CS_ISO_8859_5",
55         "CS_ISO_8859_6",
56         "CS_ISO_8859_7",
57         "CS_ISO_8859_8",
58         "CS_ISO_8859_9",
59         "CS_UNICODE"
60 };
61 #endif  /* CONFIG_IRDA_DEBUG */
62
63 static hashbin_t *iriap = NULL;
64 static void *service_handle;
65
66 static void __iriap_close(struct iriap_cb *self);
67 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
68 static void iriap_disconnect_indication(void *instance, void *sap,
69                                         LM_REASON reason, struct sk_buff *skb);
70 static void iriap_connect_indication(void *instance, void *sap,
71                                      struct qos_info *qos, __u32 max_sdu_size,
72                                      __u8 max_header_size,
73                                      struct sk_buff *skb);
74 static void iriap_connect_confirm(void *instance, void *sap,
75                                   struct qos_info *qos,
76                                   __u32 max_sdu_size, __u8 max_header_size,
77                                   struct sk_buff *skb);
78 static int iriap_data_indication(void *instance, void *sap,
79                                  struct sk_buff *skb);
80
81 static void iriap_watchdog_timer_expired(void *data);
82
83 static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
84                                               int timeout)
85 {
86         irda_start_timer(&self->watchdog_timer, timeout, self,
87                          iriap_watchdog_timer_expired);
88 }
89
90 /*
91  * Function iriap_init (void)
92  *
93  *    Initializes the IrIAP layer, called by the module initialization code
94  *    in irmod.c
95  */
96 int __init iriap_init(void)
97 {
98         struct ias_object *obj;
99         struct iriap_cb *server;
100         __u8 oct_seq[6];
101         __u16 hints;
102
103         /* Allocate master array */
104         iriap = hashbin_new(HB_LOCK);
105         if (!iriap)
106                 return -ENOMEM;
107
108         /* Object repository - defined in irias_object.c */
109         irias_objects = hashbin_new(HB_LOCK);
110         if (!irias_objects) {
111                 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
112                              __func__);
113                 hashbin_delete(iriap, NULL);
114                 return -ENOMEM;
115         }
116
117         /*
118          *  Register some default services for IrLMP
119          */
120         hints  = irlmp_service_to_hint(S_COMPUTER);
121         service_handle = irlmp_register_service(hints);
122
123         /* Register the Device object with LM-IAS */
124         obj = irias_new_object("Device", IAS_DEVICE_ID);
125         irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
126
127         oct_seq[0] = 0x01;  /* Version 1 */
128         oct_seq[1] = 0x00;  /* IAS support bits */
129         oct_seq[2] = 0x00;  /* LM-MUX support bits */
130 #ifdef CONFIG_IRDA_ULTRA
131         oct_seq[2] |= 0x04; /* Connectionless Data support */
132 #endif
133         irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
134                                 IAS_KERNEL_ATTR);
135         irias_insert_object(obj);
136
137         /*
138          *  Register server support with IrLMP so we can accept incoming
139          *  connections
140          */
141         server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
142         if (!server) {
143                 IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
144                 return -1;
145         }
146         iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
147
148         return 0;
149 }
150
151 /*
152  * Function iriap_cleanup (void)
153  *
154  *    Initializes the IrIAP layer, called by the module cleanup code in
155  *    irmod.c
156  */
157 void iriap_cleanup(void)
158 {
159         irlmp_unregister_service(service_handle);
160
161         hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
162         hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
163 }
164
165 /*
166  * Function iriap_open (void)
167  *
168  *    Opens an instance of the IrIAP layer, and registers with IrLMP
169  */
170 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
171                             CONFIRM_CALLBACK callback)
172 {
173         struct iriap_cb *self;
174
175         IRDA_DEBUG(2, "%s()\n", __func__);
176
177         self = kzalloc(sizeof(*self), GFP_ATOMIC);
178         if (!self) {
179                 IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
180                 return NULL;
181         }
182
183         /*
184          *  Initialize instance
185          */
186
187         self->magic = IAS_MAGIC;
188         self->mode = mode;
189         if (mode == IAS_CLIENT)
190                 iriap_register_lsap(self, slsap_sel, mode);
191
192         self->confirm = callback;
193         self->priv = priv;
194
195         /* iriap_getvaluebyclass_request() will construct packets before
196          * we connect, so this must have a sane value... Jean II */
197         self->max_header_size = LMP_MAX_HEADER;
198
199         init_timer(&self->watchdog_timer);
200
201         hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
202
203         /* Initialize state machines */
204         iriap_next_client_state(self, S_DISCONNECT);
205         iriap_next_call_state(self, S_MAKE_CALL);
206         iriap_next_server_state(self, R_DISCONNECT);
207         iriap_next_r_connect_state(self, R_WAITING);
208
209         return self;
210 }
211 EXPORT_SYMBOL(iriap_open);
212
213 /*
214  * Function __iriap_close (self)
215  *
216  *    Removes (deallocates) the IrIAP instance
217  *
218  */
219 static void __iriap_close(struct iriap_cb *self)
220 {
221         IRDA_DEBUG(4, "%s()\n", __func__);
222
223         IRDA_ASSERT(self != NULL, return;);
224         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
225
226         del_timer(&self->watchdog_timer);
227
228         if (self->request_skb)
229                 dev_kfree_skb(self->request_skb);
230
231         self->magic = 0;
232
233         kfree(self);
234 }
235
236 /*
237  * Function iriap_close (void)
238  *
239  *    Closes IrIAP and deregisters with IrLMP
240  */
241 void iriap_close(struct iriap_cb *self)
242 {
243         struct iriap_cb *entry;
244
245         IRDA_DEBUG(2, "%s()\n", __func__);
246
247         IRDA_ASSERT(self != NULL, return;);
248         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
249
250         if (self->lsap) {
251                 irlmp_close_lsap(self->lsap);
252                 self->lsap = NULL;
253         }
254
255         entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
256         IRDA_ASSERT(entry == self, return;);
257
258         __iriap_close(self);
259 }
260 EXPORT_SYMBOL(iriap_close);
261
262 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
263 {
264         notify_t notify;
265
266         IRDA_DEBUG(2, "%s()\n", __func__);
267
268         irda_notify_init(&notify);
269         notify.connect_confirm       = iriap_connect_confirm;
270         notify.connect_indication    = iriap_connect_indication;
271         notify.disconnect_indication = iriap_disconnect_indication;
272         notify.data_indication       = iriap_data_indication;
273         notify.instance = self;
274         if (mode == IAS_CLIENT)
275                 strcpy(notify.name, "IrIAS cli");
276         else
277                 strcpy(notify.name, "IrIAS srv");
278
279         self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
280         if (self->lsap == NULL) {
281                 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
282                 return -1;
283         }
284         self->slsap_sel = self->lsap->slsap_sel;
285
286         return 0;
287 }
288
289 /*
290  * Function iriap_disconnect_indication (handle, reason)
291  *
292  *    Got disconnect, so clean up everything associated with this connection
293  *
294  */
295 static void iriap_disconnect_indication(void *instance, void *sap,
296                                         LM_REASON reason,
297                                         struct sk_buff *skb)
298 {
299         struct iriap_cb *self;
300
301         IRDA_DEBUG(4, "%s(), reason=%s\n", __func__, irlmp_reasons[reason]);
302
303         self = (struct iriap_cb *) instance;
304
305         IRDA_ASSERT(self != NULL, return;);
306         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
307
308         IRDA_ASSERT(iriap != NULL, return;);
309
310         del_timer(&self->watchdog_timer);
311
312         /* Not needed */
313         if (skb)
314                 dev_kfree_skb(skb);
315
316         if (self->mode == IAS_CLIENT) {
317                 IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
318
319
320                 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
321                                       NULL);
322                 /*
323                  * Inform service user that the request failed by sending
324                  * it a NULL value. Warning, the client might close us, so
325                  * remember no to use self anymore after calling confirm
326                  */
327                 if (self->confirm)
328                         self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
329         } else {
330                 IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
331                 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
332                                       NULL);
333                 iriap_close(self);
334         }
335 }
336
337 /*
338  * Function iriap_disconnect_request (handle)
339  */
340 static void iriap_disconnect_request(struct iriap_cb *self)
341 {
342         struct sk_buff *tx_skb;
343
344         IRDA_DEBUG(4, "%s()\n", __func__);
345
346         IRDA_ASSERT(self != NULL, return;);
347         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
348
349         tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
350         if (tx_skb == NULL) {
351                 IRDA_DEBUG(0,
352                            "%s(), Could not allocate an sk_buff of length %d\n",
353                            __func__, LMP_MAX_HEADER);
354                 return;
355         }
356
357         /*
358          *  Reserve space for MUX control and LAP header
359          */
360         skb_reserve(tx_skb, LMP_MAX_HEADER);
361
362         irlmp_disconnect_request(self->lsap, tx_skb);
363 }
364
365 /*
366  * Function iriap_getvaluebyclass (addr, name, attr)
367  *
368  *    Retrieve all values from attribute in all objects with given class
369  *    name
370  */
371 int iriap_getvaluebyclass_request(struct iriap_cb *self,
372                                   __u32 saddr, __u32 daddr,
373                                   char *name, char *attr)
374 {
375         struct sk_buff *tx_skb;
376         int name_len, attr_len, skb_len;
377         __u8 *frame;
378
379         IRDA_ASSERT(self != NULL, return -1;);
380         IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
381
382         /* Client must supply the destination device address */
383         if (!daddr)
384                 return -1;
385
386         self->daddr = daddr;
387         self->saddr = saddr;
388
389         /*
390          *  Save operation, so we know what the later indication is about
391          */
392         self->operation = GET_VALUE_BY_CLASS;
393
394         /* Give ourselves 10 secs to finish this operation */
395         iriap_start_watchdog_timer(self, 10*HZ);
396
397         name_len = strlen(name);        /* Up to IAS_MAX_CLASSNAME = 60 */
398         attr_len = strlen(attr);        /* Up to IAS_MAX_ATTRIBNAME = 60 */
399
400         skb_len = self->max_header_size+2+name_len+1+attr_len+4;
401         tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
402         if (!tx_skb)
403                 return -ENOMEM;
404
405         /* Reserve space for MUX and LAP header */
406         skb_reserve(tx_skb, self->max_header_size);
407         skb_put(tx_skb, 3+name_len+attr_len);
408         frame = tx_skb->data;
409
410         /* Build frame */
411         frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
412         frame[1] = name_len;                       /* Insert length of name */
413         memcpy(frame+2, name, name_len);           /* Insert name */
414         frame[2+name_len] = attr_len;              /* Insert length of attr */
415         memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
416
417         iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
418
419         /* Drop reference count - see state_s_disconnect(). */
420         dev_kfree_skb(tx_skb);
421
422         return 0;
423 }
424 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
425
426 /*
427  * Function iriap_getvaluebyclass_confirm (self, skb)
428  *
429  *    Got result from GetValueByClass command. Parse it and return result
430  *    to service user.
431  *
432  */
433 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
434                                           struct sk_buff *skb)
435 {
436         struct ias_value *value;
437         int charset;
438         __u32 value_len;
439         __u32 tmp_cpu32;
440         __u16 obj_id;
441         __u16 len;
442         __u8  type;
443         __u8 *fp;
444         int n;
445
446         IRDA_ASSERT(self != NULL, return;);
447         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
448         IRDA_ASSERT(skb != NULL, return;);
449
450         /* Initialize variables */
451         fp = skb->data;
452         n = 2;
453
454         /* Get length, MSB first */
455         len = get_unaligned_be16(fp + n);
456         n += 2;
457
458         IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
459
460         /* Get object ID, MSB first */
461         obj_id = get_unaligned_be16(fp + n);
462         n += 2;
463
464         type = fp[n++];
465         IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
466
467         switch (type) {
468         case IAS_INTEGER:
469                 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
470                 be32_to_cpus(&tmp_cpu32);
471                 value = irias_new_integer_value(tmp_cpu32);
472
473                 /*  Legal values restricted to 0x01-0x6f, page 15 irttp */
474                 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
475                 break;
476         case IAS_STRING:
477                 charset = fp[n++];
478
479                 switch (charset) {
480                 case CS_ASCII:
481                         break;
482 /*              case CS_ISO_8859_1: */
483 /*              case CS_ISO_8859_2: */
484 /*              case CS_ISO_8859_3: */
485 /*              case CS_ISO_8859_4: */
486 /*              case CS_ISO_8859_5: */
487 /*              case CS_ISO_8859_6: */
488 /*              case CS_ISO_8859_7: */
489 /*              case CS_ISO_8859_8: */
490 /*              case CS_ISO_8859_9: */
491 /*              case CS_UNICODE: */
492                 default:
493                         IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
494                                    __func__, ias_charset_types[charset]);
495
496                         /* Aborting, close connection! */
497                         iriap_disconnect_request(self);
498                         return;
499                         /* break; */
500                 }
501                 value_len = fp[n++];
502                 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
503
504                 /* Make sure the string is null-terminated */
505                 fp[n+value_len] = 0x00;
506                 IRDA_DEBUG(4, "Got string %s\n", fp+n);
507
508                 /* Will truncate to IAS_MAX_STRING bytes */
509                 value = irias_new_string_value(fp+n);
510                 break;
511         case IAS_OCT_SEQ:
512                 value_len = get_unaligned_be16(fp + n);
513                 n += 2;
514
515                 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
516                 value = irias_new_octseq_value(fp+n, value_len);
517                 break;
518         default:
519                 value = irias_new_missing_value();
520                 break;
521         }
522
523         /* Finished, close connection! */
524         iriap_disconnect_request(self);
525
526         /* Warning, the client might close us, so remember no to use self
527          * anymore after calling confirm
528          */
529         if (self->confirm)
530                 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
531         else {
532                 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
533                 irias_delete_value(value);
534         }
535 }
536
537 /*
538  * Function iriap_getvaluebyclass_response ()
539  *
540  *    Send answer back to remote LM-IAS
541  *
542  */
543 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
544                                            __u16 obj_id,
545                                            __u8 ret_code,
546                                            struct ias_value *value)
547 {
548         struct sk_buff *tx_skb;
549         int n;
550         __be32 tmp_be32;
551         __be16 tmp_be16;
552         __u8 *fp;
553
554         IRDA_DEBUG(4, "%s()\n", __func__);
555
556         IRDA_ASSERT(self != NULL, return;);
557         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
558         IRDA_ASSERT(value != NULL, return;);
559         IRDA_ASSERT(value->len <= 1024, return;);
560
561         /* Initialize variables */
562         n = 0;
563
564         /*
565          *  We must adjust the size of the response after the length of the
566          *  value. We add 32 bytes because of the 6 bytes for the frame and
567          *  max 5 bytes for the value coding.
568          */
569         tx_skb = alloc_skb(value->len + self->max_header_size + 32,
570                            GFP_ATOMIC);
571         if (!tx_skb)
572                 return;
573
574         /* Reserve space for MUX and LAP header */
575         skb_reserve(tx_skb, self->max_header_size);
576         skb_put(tx_skb, 6);
577
578         fp = tx_skb->data;
579
580         /* Build frame */
581         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
582         fp[n++] = ret_code;
583
584         /* Insert list length (MSB first) */
585         tmp_be16 = htons(0x0001);
586         memcpy(fp+n, &tmp_be16, 2);  n += 2;
587
588         /* Insert object identifier ( MSB first) */
589         tmp_be16 = cpu_to_be16(obj_id);
590         memcpy(fp+n, &tmp_be16, 2); n += 2;
591
592         switch (value->type) {
593         case IAS_STRING:
594                 skb_put(tx_skb, 3 + value->len);
595                 fp[n++] = value->type;
596                 fp[n++] = 0; /* ASCII */
597                 fp[n++] = (__u8) value->len;
598                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
599                 break;
600         case IAS_INTEGER:
601                 skb_put(tx_skb, 5);
602                 fp[n++] = value->type;
603
604                 tmp_be32 = cpu_to_be32(value->t.integer);
605                 memcpy(fp+n, &tmp_be32, 4); n += 4;
606                 break;
607         case IAS_OCT_SEQ:
608                 skb_put(tx_skb, 3 + value->len);
609                 fp[n++] = value->type;
610
611                 tmp_be16 = cpu_to_be16(value->len);
612                 memcpy(fp+n, &tmp_be16, 2); n += 2;
613                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
614                 break;
615         case IAS_MISSING:
616                 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
617                 skb_put(tx_skb, 1);
618                 fp[n++] = value->type;
619                 break;
620         default:
621                 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
622                 break;
623         }
624         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
625
626         /* Drop reference count - see state_r_execute(). */
627         dev_kfree_skb(tx_skb);
628 }
629
630 /*
631  * Function iriap_getvaluebyclass_indication (self, skb)
632  *
633  *    getvaluebyclass is requested from peer LM-IAS
634  *
635  */
636 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
637                                              struct sk_buff *skb)
638 {
639         struct ias_object *obj;
640         struct ias_attrib *attrib;
641         int name_len;
642         int attr_len;
643         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
644         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
645         __u8 *fp;
646         int n;
647
648         IRDA_DEBUG(4, "%s()\n", __func__);
649
650         IRDA_ASSERT(self != NULL, return;);
651         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
652         IRDA_ASSERT(skb != NULL, return;);
653
654         fp = skb->data;
655         n = 1;
656
657         name_len = fp[n++];
658         memcpy(name, fp+n, name_len); n+=name_len;
659         name[name_len] = '\0';
660
661         attr_len = fp[n++];
662         memcpy(attr, fp+n, attr_len); n+=attr_len;
663         attr[attr_len] = '\0';
664
665         IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
666         obj = irias_find_object(name);
667
668         if (obj == NULL) {
669                 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
670                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
671                                                &irias_missing);
672                 return;
673         }
674         IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
675
676         attrib = irias_find_attrib(obj, attr);
677         if (attrib == NULL) {
678                 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
679                 iriap_getvaluebyclass_response(self, obj->id,
680                                                IAS_ATTRIB_UNKNOWN,
681                                                &irias_missing);
682                 return;
683         }
684
685         /* We have a match; send the value.  */
686         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
687                                        attrib->value);
688 }
689
690 /*
691  * Function iriap_send_ack (void)
692  *
693  *    Currently not used
694  *
695  */
696 void iriap_send_ack(struct iriap_cb *self)
697 {
698         struct sk_buff *tx_skb;
699         __u8 *frame;
700
701         IRDA_DEBUG(2, "%s()\n", __func__);
702
703         IRDA_ASSERT(self != NULL, return;);
704         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
705
706         tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
707         if (!tx_skb)
708                 return;
709
710         /* Reserve space for MUX and LAP header */
711         skb_reserve(tx_skb, self->max_header_size);
712         skb_put(tx_skb, 1);
713         frame = tx_skb->data;
714
715         /* Build frame */
716         frame[0] = IAP_LST | IAP_ACK | self->operation;
717
718         irlmp_data_request(self->lsap, tx_skb);
719 }
720
721 void iriap_connect_request(struct iriap_cb *self)
722 {
723         int ret;
724
725         IRDA_ASSERT(self != NULL, return;);
726         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
727
728         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
729                                     self->saddr, self->daddr,
730                                     NULL, NULL);
731         if (ret < 0) {
732                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
733                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
734         }
735 }
736
737 /*
738  * Function iriap_connect_confirm (handle, skb)
739  *
740  *    LSAP connection confirmed!
741  *
742  */
743 static void iriap_connect_confirm(void *instance, void *sap,
744                                   struct qos_info *qos, __u32 max_seg_size,
745                                   __u8 max_header_size,
746                                   struct sk_buff *skb)
747 {
748         struct iriap_cb *self;
749
750         self = (struct iriap_cb *) instance;
751
752         IRDA_ASSERT(self != NULL, return;);
753         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
754         IRDA_ASSERT(skb != NULL, return;);
755
756         self->max_data_size = max_seg_size;
757         self->max_header_size = max_header_size;
758
759         del_timer(&self->watchdog_timer);
760
761         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
762
763         /* Drop reference count - see state_s_make_call(). */
764         dev_kfree_skb(skb);
765 }
766
767 /*
768  * Function iriap_connect_indication ( handle, skb)
769  *
770  *    Remote LM-IAS is requesting connection
771  *
772  */
773 static void iriap_connect_indication(void *instance, void *sap,
774                                      struct qos_info *qos, __u32 max_seg_size,
775                                      __u8 max_header_size,
776                                      struct sk_buff *skb)
777 {
778         struct iriap_cb *self, *new;
779
780         IRDA_DEBUG(1, "%s()\n", __func__);
781
782         self = (struct iriap_cb *) instance;
783
784         IRDA_ASSERT(skb != NULL, return;);
785         IRDA_ASSERT(self != NULL, goto out;);
786         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
787
788         /* Start new server */
789         new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
790         if (!new) {
791                 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
792                 goto out;
793         }
794
795         /* Now attach up the new "socket" */
796         new->lsap = irlmp_dup(self->lsap, new);
797         if (!new->lsap) {
798                 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
799                 goto out;
800         }
801
802         new->max_data_size = max_seg_size;
803         new->max_header_size = max_header_size;
804
805         /* Clean up the original one to keep it in listen state */
806         irlmp_listen(self->lsap);
807
808         iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
809
810 out:
811         /* Drop reference count - see state_r_disconnect(). */
812         dev_kfree_skb(skb);
813 }
814
815 /*
816  * Function iriap_data_indication (handle, skb)
817  *
818  *    Receives data from connection identified by handle from IrLMP
819  *
820  */
821 static int iriap_data_indication(void *instance, void *sap,
822                                  struct sk_buff *skb)
823 {
824         struct iriap_cb *self;
825         __u8  *frame;
826         __u8  opcode;
827
828         IRDA_DEBUG(3, "%s()\n", __func__);
829
830         self = (struct iriap_cb *) instance;
831
832         IRDA_ASSERT(skb != NULL, return 0;);
833         IRDA_ASSERT(self != NULL, goto out;);
834         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
835
836         frame = skb->data;
837
838         if (self->mode == IAS_SERVER) {
839                 /* Call server */
840                 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
841                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
842                 goto out;
843         }
844         opcode = frame[0];
845         if (~opcode & IAP_LST) {
846                 IRDA_WARNING("%s:, IrIAS multiframe commands or "
847                              "results is not implemented yet!\n",
848                              __func__);
849                 goto out;
850         }
851
852         /* Check for ack frames since they don't contain any data */
853         if (opcode & IAP_ACK) {
854                 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
855                 goto out;
856         }
857
858         opcode &= ~IAP_LST; /* Mask away LST bit */
859
860         switch (opcode) {
861         case GET_INFO_BASE:
862                 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
863                 break;
864         case GET_VALUE_BY_CLASS:
865                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
866
867                 switch (frame[1]) {
868                 case IAS_SUCCESS:
869                         iriap_getvaluebyclass_confirm(self, skb);
870                         break;
871                 case IAS_CLASS_UNKNOWN:
872                         IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
873                         /* Finished, close connection! */
874                         iriap_disconnect_request(self);
875
876                         /*
877                          * Warning, the client might close us, so remember
878                          * no to use self anymore after calling confirm
879                          */
880                         if (self->confirm)
881                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
882                                               self->priv);
883                         break;
884                 case IAS_ATTRIB_UNKNOWN:
885                         IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
886                         /* Finished, close connection! */
887                         iriap_disconnect_request(self);
888
889                         /*
890                          * Warning, the client might close us, so remember
891                          * no to use self anymore after calling confirm
892                          */
893                         if (self->confirm)
894                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
895                                               self->priv);
896                         break;
897                 }
898                 break;
899         default:
900                 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
901                            opcode);
902                 break;
903         }
904
905 out:
906         /* Cleanup - sub-calls will have done skb_get() as needed. */
907         dev_kfree_skb(skb);
908         return 0;
909 }
910
911 /*
912  * Function iriap_call_indication (self, skb)
913  *
914  *    Received call to server from peer LM-IAS
915  *
916  */
917 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
918 {
919         __u8 *fp;
920         __u8 opcode;
921
922         IRDA_DEBUG(4, "%s()\n", __func__);
923
924         IRDA_ASSERT(self != NULL, return;);
925         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
926         IRDA_ASSERT(skb != NULL, return;);
927
928         fp = skb->data;
929
930         opcode = fp[0];
931         if (~opcode & 0x80) {
932                 IRDA_WARNING("%s: IrIAS multiframe commands or results "
933                              "is not implemented yet!\n", __func__);
934                 return;
935         }
936         opcode &= 0x7f; /* Mask away LST bit */
937
938         switch (opcode) {
939         case GET_INFO_BASE:
940                 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
941                              __func__);
942                 break;
943         case GET_VALUE_BY_CLASS:
944                 iriap_getvaluebyclass_indication(self, skb);
945                 break;
946         }
947         /* skb will be cleaned up in iriap_data_indication */
948 }
949
950 /*
951  * Function iriap_watchdog_timer_expired (data)
952  *
953  *    Query has taken too long time, so abort
954  *
955  */
956 static void iriap_watchdog_timer_expired(void *data)
957 {
958         struct iriap_cb *self = (struct iriap_cb *) data;
959
960         IRDA_ASSERT(self != NULL, return;);
961         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
962
963         /* iriap_close(self); */
964 }
965
966 #ifdef CONFIG_PROC_FS
967
968 static const char *const ias_value_types[] = {
969         "IAS_MISSING",
970         "IAS_INTEGER",
971         "IAS_OCT_SEQ",
972         "IAS_STRING"
973 };
974
975 static inline struct ias_object *irias_seq_idx(loff_t pos)
976 {
977         struct ias_object *obj;
978
979         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
980              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
981                 if (pos-- == 0)
982                         break;
983         }
984
985         return obj;
986 }
987
988 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
989 {
990         spin_lock_irq(&irias_objects->hb_spinlock);
991
992         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
993 }
994
995 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
996 {
997         ++*pos;
998
999         return (v == SEQ_START_TOKEN)
1000                 ? (void *) hashbin_get_first(irias_objects)
1001                 : (void *) hashbin_get_next(irias_objects);
1002 }
1003
1004 static void irias_seq_stop(struct seq_file *seq, void *v)
1005 {
1006         spin_unlock_irq(&irias_objects->hb_spinlock);
1007 }
1008
1009 static int irias_seq_show(struct seq_file *seq, void *v)
1010 {
1011         if (v == SEQ_START_TOKEN)
1012                 seq_puts(seq, "LM-IAS Objects:\n");
1013         else {
1014                 struct ias_object *obj = v;
1015                 struct ias_attrib *attrib;
1016
1017                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1018
1019                 seq_printf(seq, "name: %s, id=%d\n",
1020                            obj->name, obj->id);
1021
1022                 /* Careful for priority inversions here !
1023                  * All other uses of attrib spinlock are independent of
1024                  * the object spinlock, so we are safe. Jean II */
1025                 spin_lock(&obj->attribs->hb_spinlock);
1026
1027                 /* List all attributes for this object */
1028                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1029                      attrib != NULL;
1030                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1031
1032                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1033                                     goto outloop; );
1034
1035                         seq_printf(seq, " - Attribute name: \"%s\", ",
1036                                    attrib->name);
1037                         seq_printf(seq, "value[%s]: ",
1038                                    ias_value_types[attrib->value->type]);
1039
1040                         switch (attrib->value->type) {
1041                         case IAS_INTEGER:
1042                                 seq_printf(seq, "%d\n",
1043                                            attrib->value->t.integer);
1044                                 break;
1045                         case IAS_STRING:
1046                                 seq_printf(seq, "\"%s\"\n",
1047                                            attrib->value->t.string);
1048                                 break;
1049                         case IAS_OCT_SEQ:
1050                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1051                                            attrib->value->len);
1052                                 break;
1053                         case IAS_MISSING:
1054                                 seq_puts(seq, "missing\n");
1055                                 break;
1056                         default:
1057                                 seq_printf(seq, "type %d?\n",
1058                                            attrib->value->type);
1059                         }
1060                         seq_putc(seq, '\n');
1061
1062                 }
1063         IRDA_ASSERT_LABEL(outloop:)
1064                 spin_unlock(&obj->attribs->hb_spinlock);
1065         }
1066
1067         return 0;
1068 }
1069
1070 static const struct seq_operations irias_seq_ops = {
1071         .start  = irias_seq_start,
1072         .next   = irias_seq_next,
1073         .stop   = irias_seq_stop,
1074         .show   = irias_seq_show,
1075 };
1076
1077 static int irias_seq_open(struct inode *inode, struct file *file)
1078 {
1079         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1080
1081         return seq_open(file, &irias_seq_ops);
1082 }
1083
1084 const struct file_operations irias_seq_fops = {
1085         .owner          = THIS_MODULE,
1086         .open           = irias_seq_open,
1087         .read           = seq_read,
1088         .llseek         = seq_lseek,
1089         .release        = seq_release,
1090 };
1091
1092 #endif /* PROC_FS */